package com.kangdi.riggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.kangdi.riggie.common.BaseContext;
import com.kangdi.riggie.common.CategoryException;
import com.kangdi.riggie.entity.*;
import com.kangdi.riggie.mapper.OrdersMapper;
import com.kangdi.riggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.swing.undo.CannotRedoException;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Override
    @Transactional
    public void addOrder(Orders orders) {
        Long userId = BaseContext.get();
        User user = userService.getById(userId);
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook==null){
            throw new CategoryException("该地址已不存在");
        }
        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper = new LambdaQueryWrapper<>();
        shoppingCartLambdaQueryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> cartList = shoppingCartService.list(shoppingCartLambdaQueryWrapper);
        if (cartList == null || cartList.size() == 0){
            throw new CategoryException("购物车为空，不能下单！");
        }
        long orderId = IdWorker.getId();  // 订单号
        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetails = cartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();

            orderDetail.setOrderId(orderId);
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());

            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setAmount(item.getAmount());

            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());

            return orderDetail;

        }).collect(Collectors.toList());
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额，需要 遍历购物车，计算相关金额来得到
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        this.save(orders);    //  --> ordersService.save(orders);

        // 向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        // 清空购物车数据
        shoppingCartService.remove(shoppingCartLambdaQueryWrapper);

    }

}
